Ripple suppression circuit of output current

A technology of ripple suppression and output current, applied in the field of DC_DC switching power supply, can solve the problems of high cost, large size of LDO, high power consumption, etc., and achieve the effect of low cost, small size and high efficiency
CN106533158AInactive Publication Date: 2017-03-22LEIHUA ELECTRONICS TECH RES INST AVIATION IND OF CHINA
4 Cites 3 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
LEIHUA ELECTRONICS TECH RES INST AVIATION IND OF CHINA
Publication Date
2017-03-22
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a ripple suppression circuit of output current. The ripple suppression circuit of the output current comprises an inductive circuit, a ripple cancellation circuit and a blocking circuit, wherein a primary-side dotted terminal of the inductive circuit is connected to an input end of an output filter inductor of a DC-DC switching power supply circuit as the input end; a secondary-side dotted terminal of the inductive circuit is connected to an output end of the blocking circuit as the input end; a primary-side non-dotted terminal of the inductive circuit is connected to the output end of the output filter inductor of the DC-DC switching power supply circuit as the output end; a secondary-side non-dotted terminal of the inductive circuit is connected to the input end of the ripple cancellation circuit as the output end; the input end of the blocking circuit is connected to a cathode of the DC-DC switching power supply circuit; and the output end of the ripple cancellation circuit is connected to an anode of the DC-DC switching power supply circuit. According to the ripple suppression circuit of the output current disclosed by the invention, an AC component in the output current of a DC-DC switching power supply can be cancelled to obtain a good ripple suppression effect; and the ripple suppression circuit also has the advantages of few components, low cost, high efficiency and small volume.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to the technical field of DC-DC switching power supplies, in particular to an output current ripple suppression circuit. Background technique

[0002] Switching power supply is a kind of power supply that uses modern power electronic technology to control the time ratio of switching on and off to maintain a stable output voltage. Compared with linear power supplies, switching power supplies usually have a larger ripple factor. However, the ripple factor is an important indicator of the switching power supply. If the ripple is large, it will affect the normal operation of the switching power supply load, and will bring problems such as amplifier noise and electromagnetic interference (EMI) noise.

[0003] Usually, an LC filter circuit is added to the output end of the DC_DC switching power supply to suppress the output ripple. The power switching device works in the switching state, so that the voltage across the output filter in...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More